Method and Apparatus for Controlling Fingerprint Acquisition Based on a Display Screen and Electronic Device

ABSTRACT

The present application discloses a method for controlling fingerprint acquisition based on a display screen and a related apparatus, which are applied to a display screen with a fingerprint acquisition function. In the disclosure, by detecting a fingerprint acquisition triggering instruction generated in an electronic device in real time, a preset fingerprint acquisition region of the display screen is controlled to emit light and a fingerprint sensor is triggered to acquire a fingerprint image, if and only if the fingerprint acquisition triggering instruction is detected. When the fingerprint acquisition triggering instruction does not exist, the display screen is not affected and the fingerprint sensor is in a non-operating state so as to save energy. Moreover, only the preset fingerprint acquisition region on the display screen is controlled to perform the fingerprint acquisition, and other regions on the display screen are not affected in fingerprint acquisition, therefore, the original display or the black screen state of the display screen is not affected, and it is ensured that the user can accurately touch the region with a finger to acquire a fingerprint image accurately and quickly. In this way, the cost of hardware integration may be reduced, the appearance may be simplified and the user experience may be improved.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/561,235 filed Sep. 25, 2017, which application is a U.S. NationalPhase Application of PCT Application No. PCT/CN2017/083608 filed May 9,2017, which application claims priority to Chinese Patent ApplicationNo. 201610594600.4, titled “Method and apparatus for controllingfingerprint acquisition based on a display screen and electronicdevice”, filed on Jul. 25, 2016, the entire contents of which areincorporated herein by reference.

FIELD OF TECHNOLOGY

The present disclosure relates to the field of fingerprint acquisition,and in particular, to a method and apparatus for controlling fingerprintacquisition based on a display screen and an electronic device.

BACKGROUND

With the development of science and technology and the increase inpublic security awareness, it is a trend that personal identity isrecognized with inherent physiological characteristics (such asfingerprint, face, iris) and behavioral characteristics (such ashandwriting, sound, gait) of the human body by closely combining acomputer with high-technology means such as optics, acoustics, biology.The fingerprint identification technology has been widely used invarious electronic devices such as mobile phones, notebook computers,and tablet computers due to simplicity, practicality and the like.

The key of the fingerprint identification technology is to acquire afingerprint. The existing fingerprint acquisition device as anindependent device is generally arranged on the back or side of anelectronic device, or hidden under the HOME solid key on the front ofthe electronic device. Correspondingly, the existing control method forthe fingerprint acquisition device is also relatively independent, and auser can put a finger on the fingerprint acquisition device at any timeto trigger the electronic device to complete the fingerprintacquisition.

However, with the integration and ultra-thin development trend of theelectronic device, an ultra-thin fingerprint acquisition component canbe installed under a display screen of the electronic device to achievea fingerprint acquisition function on the display screen, which canimprove the integration degree of the electronic device and make theelectronic equipment thinner. In view of this, the fingerprintacquisition component is integrated into the display screen, and theabove-described relatively independent control method for fingerprintacquisition is no longer applicable. Therefore, it is necessary toprovide a new control method for fingerprint acquisition to ensure anaccurate and effective man-machine interaction in acquiring fingerprintbased on the display screen without affecting the original displayfunction of the display screen, and enhance the user experience.

SUMMARY

The present disclosure provides a method and apparatus for controllingfingerprint acquisition based on a display screen and an electronicdevice, so as to solve a fingerprint acquisition control problem of anelectronic device in which a fingerprint sensor is integrated under adisplay screen.

In a first aspect of the present disclosure, a method for controllingfingerprint acquisition based on a display screen is provided. Themethod is applied to an electronic device. The electronic deviceincludes at least a display screen, and a fingerprint sensor installedunder the display screen corresponding to a preset fingerprintacquisition region of the display screen. The method includes: detectinga fingerprint acquisition triggering instruction from a user or anapplication; controlling the preset fingerprint acquisition region toemit light to illuminate a finger surface, according to the fingerprintacquisition triggering instruction detected; and triggering thefingerprint sensor to acquire a fingerprint image.

In conjunction with the first aspect, in a first feasible embodiment ofthe first aspect, the fingerprint acquisition triggering instructionincludes at least one of: a first display screen wake-up instruction, asecond display screen wake-up instruction, a display screen wake-up andauthentication instruction and an authentication instruction.

The first display screen wake-up instruction is generated when it isdetected that a power key or a start key of the electronic device ispressed by a user in a black screen state.

The second display screen wake-up instruction is generated when a touchsensing apparatus detects that a first touch operation is performed bythe user in a black screen state. The first touch operation comprisesany one of performing a single click on the display screen, performing acontinuous click on the display screen and touching the display screenfor a long time. The touch sensing apparatus is disposed in theelectronic device to detect a touch operation of the user on the displayscreen.

The display screen wake-up and authentication instruction is generatedwhen the touch sensing apparatus detects that a second touch operationis performed by the user in a black screen state. The second touchoperation comprises any one of performing a single click or continuousclick on the preset fingerprint acquisition region and touching thepreset fingerprint acquisition region for a long time.

The authentication instruction is generated by the application in theelectronic device.

In conjunction with the first feasible embodiment of the first aspect,in a second feasible embodiment of the first aspect, the controlling thepreset fingerprint acquisition region to emit light according to thefingerprint acquisition triggering instruction detected includes:controlling the preset fingerprint acquisition region to emit stronglight to illuminate a finger surface, when the fingerprint acquisitiontriggering instruction detected is the display screen wake-up andauthentication instruction or the authentication instruction.

In conjunction with the first feasible embodiment of the first aspect,in a third feasible embodiment of the first aspect, the controlling thepreset fingerprint acquisition region to emit light according to thefingerprint acquisition triggering instruction detected includes:controlling the preset fingerprint acquisition region to display apreset prompt icon to prompt the user to touch the preset fingerprintacquisition region with a finger and inform the user of a position to betouched by the finger, when the fingerprint acquisition triggeringinstruction detected is the first display screen wake-up instruction orthe second display screen wake-up instruction; determining whether theuser touches the preset fingerprint acquisition region with the fingerby using the touch sensing apparatus; and controlling the presetfingerprint acquisition region to emit strong light to illuminate afinger surface, when it is determined that the user touches the presetfingerprint acquisition region with the finger.

In conjunction with the third feasible embodiment of the first aspect,in a fourth feasible embodiment of the first aspect, the controlling thepreset fingerprint acquisition region to display a preset prompt iconincludes: controlling the preset fingerprint acquisition region tostatically display the preset prompt icon, or controlling the presetfingerprint acquisition region to dynamically display the preset prompticon.

The controlling the preset fingerprint acquisition region to dynamicallydisplay the preset prompt icon includes at least one of: dynamicallyadjusting brightness of the preset prompt icon; and controlling thepreset fingerprint acquisition region to display multiple differenttypes of preset prompt icons in sequence.

In conjunction with the fourth feasible embodiment of the first aspect,in a fifth feasible embodiment of the first aspect, the type of thepreset prompt icon includes at least one of a preset figure, a presetimage, and a preset text.

In conjunction with the first aspect, the first feasible embodiment ofthe first aspect, the second feasible embodiment of the first aspect,the third feasible embodiment of the first aspect, the fourth feasibleembodiment of the first aspect or the fifth feasible embodiment of thefirst aspect, in the sixth feasible embodiment of the first aspect, thepreset fingerprint acquisition region includes at least one of: a firstregion, a second region, a third region, and a common region.

The first region is in the middle of the lower of the display screen andoverlapping with a position of a virtual key.

The second region is within an exploring hot region of a right handthumb. The exploring hot region of the right hand thumb refers to aregion which is easy to be touched by the right hand thumb in a statethat the right hand thumb bends naturally and a finger pulp thereoftouches the screen when the electronic device is held by a right hand.

The third region is within an exploring hot region of a left hand thumb.The exploring hot region of the left hand thumb refers to a region whichis easy to be touched by the left hand thumb in a state that the lefthand thumb bends naturally and a finger pulp thereof touches the screenwhen the electronic device is held by a left hand.

The common region is between the exploring hot region of the right handthumb and the exploring hot region of the left hand thumb.

In conjunction with the first aspect, the first feasible embodiment ofthe first aspect, the second feasible embodiment of the first aspect,the third feasible embodiment of the first aspect, the fourth feasibleembodiment of the first aspect or the fifth feasible embodiment of thefirst aspect, in the seventh feasible embodiment of the first aspect,the method further includes: determining whether the fingerprint imageacquired by the fingerprint sensor satisfies a preset quality standard,wherein the preset quality standard includes: at least one of an area,brightness and contrast of the fingerprint image satisfying a presetrange; and performing a preset adjustment operation and re-triggeringthe fingerprint sensor to acquire a new fingerprint image, when thefingerprint image does not satisfy the preset quality standard, whereinthe performing a preset adjustment operation includes at least one of:adjusting screen brightness of the preset fingerprint acquisitionregion, adjusting exposure time of the fingerprint sensor, and adjustinga gain coefficient of the fingerprint sensor.

In conjunction with the first aspect, the first feasible embodiment ofthe first aspect, the second feasible embodiment of the first aspect,the third feasible embodiment of the first aspect, the fourth feasibleembodiment of the first aspect or the fifth feasible embodiment of thefirst aspect, in the eighth feasible embodiment of the first aspect, themethod further includes: determining whether a preset template matchingthe fingerprint image exists; triggering the electronic device toperform a corresponding preset operation, when the preset templatematching the fingerprint image exists; and determining whether thenumber of matching failures is less than a preset number, when thepreset template matching the fingerprint image does not exist, andre-triggering the fingerprint sensor to acquire a new fingerprint image,when the number of matching failures is less than the preset number.

In a second aspect of the present disclosure, an apparatus forcontrolling fingerprint acquisition based on a display screen isprovided. The apparatus is applied to an electronic device. Theelectronic device includes at least a display screen, a touch sensingapparatus and a fingerprint sensor installed under the display screencorresponding to a preset fingerprint acquisition region of the displayscreen. The apparatus includes: a processor, and a memory configured forstoring instructions being executable by the processor. The processor isconfigured for: performing the method for controlling fingerprintacquisition based on a display screen according to any one of thefeasible embodiments of the first aspect, when the instructions storedin the memory are called.

In a third aspect of the present disclosure, an apparatus forcontrolling fingerprint acquisition based on a display screen isprovided. The apparatus is applied to an electronic device. Theelectronic device includes at least a display screen and a fingerprintsensor installed under the display screen corresponding to a presetfingerprint acquisition region of the display screen. The apparatusincludes: a triggering instruction detecting unit, configured fordetecting a fingerprint acquisition triggering instruction from a useror an application; an acquisition region control unit, configured forcontrolling the preset fingerprint acquisition region to emit light toilluminate a finger surface, according to the fingerprint acquisitiontriggering instruction detected; and a fingerprint acquisitiontriggering unit, configured for triggering the fingerprint sensor toacquire a fingerprint image, after the preset fingerprint acquisitionregion is controlled by the acquisition region control unit to emitlight.

In conjunction with the third aspect, in a first feasible embodiment ofthe third aspect, the fingerprint acquisition triggering instructiondetected by the triggering instruction detecting unit includes at leastone of: a first display screen wake-up instruction, a second displayscreen wake-up instruction, a display screen wake-up and authenticationinstruction and an authentication instruction.

The first display screen wake-up instruction is generated when it isdetected that a power key or a start key of the electronic device ispressed by a user in a black screen state.

The second display screen wake-up instruction is generated when a touchsensing apparatus detects that a first touch operation is performed bythe user in a black screen state. The first touch operation comprisesany one of performing a single click on the display screen, performing acontinuous click on the display screen and touching the display screenfor a long time. The touch sensing apparatus is disposed in theelectronic device to detect a touch operation of the user on the displayscreen.

The display screen wake-up and authentication instruction is generatedwhen the touch sensing apparatus detects that a second touch operationis performed by the user in a black screen state. The second touchoperation comprises any one of performing a single click or continuousclick on the preset fingerprint acquisition region and touching thepreset fingerprint acquisition region for a long time.

The authentication instruction is generated by an application in theelectronic device.

In conjunction with the first feasible embodiment of the third aspect,in a second feasible embodiment of the third aspect, the acquisitionregion control unit includes: a first light emitting control unit,configured for controlling the preset fingerprint acquisition region toemit strong light to illuminate a finger surface, when the fingerprintacquisition triggering instruction detected is the display screenwake-up and authentication instruction or the authenticationinstruction.

In conjunction with the first feasible embodiment of the third aspect,in a third feasible embodiment of the third aspect, the acquisitionregion control unit includes: a prompt icon control unit, configured forcontrolling the preset fingerprint acquisition region to display apreset prompt icon to prompt the user to touch the preset fingerprintacquisition region with a finger and inform the user of a position to betouched by the finger, when the fingerprint acquisition triggeringinstruction detected is the first display screen wake-up instruction orthe second display screen wake-up instruction; a touch operationdetecting unit, configured for determining whether the user touches thepreset fingerprint acquisition region with the finger by using the touchsensing apparatus, after the preset prompt icon is displayed; and asecond light emitting control unit, configured for controlling thepreset fingerprint acquisition region to emit strong light to illuminatea finger surface, when determining that the user touches the presetfingerprint acquisition region with the finger.

In conjunction with the third feasible embodiment of the third aspect,in a fourth feasible embodiment of the third aspect, the prompt iconcontrol unit includes: a prompt icon static control unit and a prompticon dynamic control unit.

The prompt icon static control unit is configured for controlling thepreset fingerprint acquisition region to statically display the presetprompt icon, when the fingerprint acquisition triggering instructiondetected is the first display screen wake-up instruction or the seconddisplay screen wake-up instruction.

The prompt icon dynamic control unit is configured for when thefingerprint acquisition triggering instruction detected is the firstdisplay screen wake-up instruction or the second display screen wake-upinstruction, controlling the preset fingerprint acquisition region todynamically display the preset prompt icon in any one of: dynamicallyadjusting brightness of the preset prompt icon; and controlling thepreset fingerprint acquisition region to display multiple differenttypes of preset prompt icons in sequence.

In conjunction with the third aspect, the first feasible embodiment ofthe third aspect, the second feasible embodiment of the third aspect,the third feasible embodiment of the third aspect, or the fourthfeasible embodiment of the third aspect, in the fifth feasibleembodiment of the third aspect, the preset fingerprint acquisitionregion on the display screen includes at least one of: a first region, asecond region, a third region and a common region.

The first region is in the middle of the lower of the display screen andoverlapping with a position of a virtual key.

The second region is within an exploring hot region of a right handthumb. The exploring hot region of the right hand thumb refers to aregion which is easy to be touched by the right hand thumb in a statethat the right hand thumb bends naturally and a finger pulp thereoftouches the screen when the electronic device is held by a right hand.

The third region is within an exploring hot region of a left hand thumb.The exploring hot region of the left hand thumb refers to a region whichis easy to be touched by the left hand thumb in a state that the lefthand thumb bends naturally and a finger pulp thereof touches the screenwhen the electronic device is held by a left hand.

The common region is between the exploring hot region of the right handthumb and the exploring hot region of the left hand thumb.

In conjunction with the third aspect, the first feasible embodiment ofthe third aspect, the second feasible embodiment of the third aspect,the third feasible embodiment of the third aspect, or the fourthfeasible embodiment of the third aspect, in the sixth feasibleembodiment of the third aspect, the apparatus further includes: an imagequality detecting unit, configured for determining whether thefingerprint image satisfies a preset quality standard, wherein thepreset quality standard includes: at least one of an area, brightnessand contrast of the fingerprint image satisfying a preset range; and acontrol parameter adjusting unit, configured for performing a presetadjustment operation and re-triggering the fingerprint sensor to acquirea new fingerprint image, when the fingerprint image does not satisfy thepreset quality standard. The performing a preset adjustment operationincludes at least one of: adjusting screen brightness of the presetfingerprint acquisition region, adjusting exposure time of thefingerprint sensor, and adjusting a gain coefficient of the fingerprintsensor.

In conjunction with the third aspect, the first feasible embodiment ofthe third aspect, the second feasible embodiment of the third aspect,the third feasible embodiment of the third aspect, or the fourthfeasible embodiment of the third aspect, in the seventh feasibleembodiment of the third aspect, the apparatus further includes: afingerprint image matching unit, configured for determining whether apreset template matching the fingerprint image exists, and triggeringthe electronic device to perform a corresponding preset operation, whena preset template matching the fingerprint image exists; and a matchingfailure processing unit, configured for determining whether the numberof matching failures is less than a preset number, when the fingerprintimage matching unit determines that the preset template matching thefingerprint image does not exists, and re-triggering the fingerprintsensor to acquire a new fingerprint image, when the number of matchingfailures is less than the preset number.

In a fourth aspect of the present disclosure, an electronic device isprovided. The electronic device includes: a display screen, a touchsensing apparatus, a fingerprint sensor installed under the displayscreen corresponding to a preset fingerprint acquisition region of thedisplay screen, and the apparatus for controlling fingerprintacquisition based on a display screen according to any one of theabove-described embodiments.

As can be seen from the above-described technical solutions, in anembodiment of the disclosure, if and only if the fingerprint acquisitiontriggering instruction is detected, that is, there is a need to performa fingerprint acquisition, the preset fingerprint acquisition region ofthe display screen is controlled to emit light and a fingerprint sensoris triggered to be in a normal operating state. Accordingly, in a casethat there is no fingerprint acquisition triggering instruction, thepreset fingerprint acquisition region can be in a black screen state ordisplay the current program interface, which is the same as otherregions of the display screen, and the fingerprint sensor can be in anon-operating state in order to reduce the power of the electronicdevice consumed for the fingerprint acquisition function as far aspossible. Meanwhile, in the embodiment of the disclosure, only thepreset fingerprint acquisition region on the display screen is used forthe fingerprint acquisition, and other regions on the display screenother than the preset fingerprint acquisition region are not affected inthe fingerprint acquisition, and still used for displaying according tothe display needs of the current scene or keep the black screen state.That is, the original display or the black screen state of the displayscreen is not affected, and it is ensured that the user can accuratelytouch the screen with a finger in acquiring fingerprint based on thedisplay screen. As a result, the accurate man-machine interaction isensured in acquiring fingerprint based on the display screen and afingerprint image is acquired accurately and quickly. Therefore, it ispossible that a hardware structure in which the ultra-thin fingerprintsensor is integrated under the display screen operates normally. Also,the cost of hardware integration may be reduced, the appearance of theelectronic device may be simplified and the user experience may beimproved.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory only,and are not restrictive of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of the description, illustrate embodiments of the disclosure andserve to explain the principles of the disclosure together with thedescription.

FIG. 1A is a perspective view of a display screen and a fingerprintsensor in an electronic device according to an embodiment of thedisclosure;

FIG. 1B is a sectional view of a display screen and a fingerprint sensorin an electronic device according to an embodiment of the disclosure;

FIG. 2 is a flowchart of a method for controlling fingerprintacquisition based on a display screen according to an embodiment of thedisclosure;

FIG. 3 is a schematic diagram of a principle for fingerprint acquisitionaccording to an embodiment of the disclosure;

FIG. 4A, FIG. 4B, FIG. 4C, FIG. 4D and FIG. 4E are schematic diagrams ofpreferred positions of a preset fingerprint acquisition region on thedisplay screen according to an embodiment of the disclosure;

FIG. 5 is a flowchart of a method for controlling fingerprintacquisition based on a display screen according to another embodiment ofthe disclosure;

FIG. 6 is a schematic diagram of an interface for dynamically displayinga preset prompt icon according to an embodiment of the disclosure;

FIG. 7 is a flowchart of a method for controlling fingerprintacquisition based on a display screen according to another embodiment ofthe disclosure;

FIG. 8 is a flowchart of a method for controlling fingerprintacquisition based on a display screen according to another embodiment ofthe disclosure;

FIG. 9 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anembodiment of the disclosure;

FIG. 10 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anotherembodiment of the disclosure;

FIG. 11 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anotherembodiment of the disclosure; and

FIG. 12 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anotherembodiment of the disclosure.

DETAILED DESCRIPTION

Here example embodiments are described in details, which are illustratedin the accompanying drawings. When the following description refers tothe accompanying drawings, unless otherwise indicated, the same numeralsin different figures denote the same or similar elements. The followingexample embodiments described do not represent all embodiments beingconsistent with the present disclosure. Instead, they are only examplesof apparatuses and methods being consistent with some aspects of thepresent disclosure as detailed in the appended claims.

A flowchart of a method for controlling fingerprint acquisition based ona display screen is provided according to an embodiment of thedisclosure. The method is applied to an electronic device. As shown in aperspective view of an electronic device in FIG. 1A and a sectional viewof an electronic device in FIG. 1B, the electronic device includes atleast a display screen 101, and a fingerprint sensor 102. A fingerprintacquisition region is preset on the display screen 101, and thefingerprint sensor 102 is disposed under the preset fingerprintacquisition region. FIG. 2 shows a flowchart of a method for controllingfingerprint acquisition based on a display screen according to anembodiment of the disclosure.

Referring to FIG. 1A, FIG. 1B and FIG. 2, the method for controllingfingerprint acquisition based on a display screen includes the followingsteps S1 to S3.

In step S1, a fingerprint acquisition triggering instruction from a useror an application is detected.

In the embodiment of the disclosure, the fingerprint acquisitiontriggering instruction represents that the electronic device needs toacquire a fingerprint of a user. According to different applicationscenes, the fingerprint acquisition triggering instruction may begenerated by the user operation. For example, when the display screen101 is in a black screen state, if the user presses a power key of theelectronic device, which indicates that the user has a requirement ofwaking-up and unlocking the display screen, the fingerprint acquisitiontriggering instruction is generated to start subsequent steps to acquirea fingerprint image required for unlocking the display screen. Thefingerprint acquisition triggering instruction may also be generated byan application running on the electronic device. For example, when theuser pays online via an application, the application needs toauthenticate the user according to the user's fingerprint. Thus, thecorresponding fingerprint acquisition triggering instruction isgenerated to start the subsequent steps to acquire a fingerprint imagerequired for authentication.

In step S2, the preset fingerprint acquisition region is controlled toemit light to illuminate a finger surface, according to the fingerprintacquisition triggering instruction detected.

In step S3, the fingerprint sensor is triggered to acquire a fingerprintimage.

In the embodiment of the disclosure, after the fingerprint acquisitiontriggering instruction is detected, the preset fingerprint acquisitionregion of the display screen 101 is controlled to emit light toilluminate a finger surface of a user. The light is reflected by thefinger and then enters the fingerprint sensor 102 under the presetfingerprint acquisition region. The light reflected is finally convertedinto a digital image signal by the fingerprint sensor 102, that is, thefingerprint image of the user is obtained.

Specifically, referring to a schematic diagram of a principle forfingerprint acquisition shown in FIG. 3, when the fingerprintacquisition triggering instruction is detected, a drive circuit forcontrolling the preset fingerprint acquisition region of the displayscreen drives corresponding display image elements to emit light, asshown by solid-line arrows in FIG. 3. The light emitted by the displayimage elements reaches the finger surface through a cover plate of thedisplay screen, and is diffused on a rough fingerprint of the finger toobtain reflected light as shown by dotted-line arrows in FIG. 3. Thereflected light passes through the cover plate, the display imageelements and their drive circuit layer and a substrate of the displayscreen in sequence, and reaches the fingerprint sensor. Then thefingerprint sensor can generates a corresponding fingerprint imageaccording to the reflected light. In order to ensure that the reflectedlight of the finger successfully enters into the fingerprint sensor 102,the cover plate and the substrate for the preset fingerprint acquisitionregion on the display screen 101 are made of a transparent material, ora light-passing hole is provided on the cover plate and the substrate.

In addition, in the embodiment of the disclosure, after the fingerprintacquisition triggering instruction is detected, the preset fingerprintacquisition region of the display screen 101 is controlled to emit lightto further inform the user of a position to be touched by the finger,thereby ensuring that the fingerprint image of the user is acquiredquickly and accurately.

As can be seen from the above-described technical solutions, in anembodiment of the disclosure, if and only if the fingerprint acquisitiontriggering instruction is detected, that is, there is a need to performa fingerprint acquisition operation, the preset fingerprint acquisitionregion of the display screen is controlled to emit light and afingerprint sensor is triggered to be in a normal operating state.Accordingly, in a case that there is no fingerprint acquisitiontriggering instruction, the preset fingerprint acquisition region can bein a black screen state or display the current program interface, whichis the same as other regions of the display screen, and the fingerprintsensor can be in a non-operating state in order to reduce the power ofthe electronic device consumed for the fingerprint acquisition functionas far as possible. Meanwhile, in the embodiment of the disclosure, onlythe preset fingerprint acquisition region on the display screen is usedin the fingerprint acquisition, and other regions on the display screenother than the preset fingerprint acquisition region are not affected inthe fingerprint acquisition, and still used for displaying according tothe display needs of the current scene or keep the black screen state.That is, the original display or the black screen state of the displayscreen is not affected, and it is ensured that the user can accuratelytouch the screen with a finger in acquiring fingerprint based on thedisplay screen. As a result, the accurate man-machine interaction isensured in acquiring fingerprint based on the display screen and afingerprint image is acquired accurately and quickly. Therefore, it ispossible that a hardware structure in which the ultra-thin fingerprintsensor is integrated under the display screen operates normally. Also,the cost of hardware integration may be reduced, the appearance of theelectronic device may be simplified and the user experience may beimproved.

Preferably, the preset fingerprint acquisition region includes, but isnot limited to, a first region, a second region, a third region and acommon region of the display screen.

The first region is in the middle of the lower of the display screen andoverlapping with a position of a virtual key, as shown in FIG. 4A;

The second region is within an exploring hot region of a right handthumb, wherein the exploring hot region of a right hand thumb refers toa region which is easy to be touched by the right hand thumb in a statethat the right hand thumb bends naturally and the finger pulp touchesthe screen when the electronic device is held by a right hand, as shownin FIG. 4B;

The third region is within an exploring hot region of a left hand thumb,wherein the exploring hot region of a left hand thumb refers to a regionwhich is easy to be touched by the left hand thumb in a state that theleft hand thumb bends naturally and the finger pulp touches the screenwhen the electronic device is held by a left hand, as shown in FIG. 4C;and

The common region is between the exploring hot region of the right handthumb and the exploring hot region of the left hand thumb, as shown inFIG. 4D.

More precisely, the display screen of the electronic device can bedivided into a plurality of rectangular regions, and the presetfingerprint acquisition region is quantitatively represented by acombination of adjacent multiple rectangular regions. As shown in FIG.4E, the display screen may be divided into a rectangular array of 16×9,and a first fingerprint acquisition region indicated by horizontalreference numerals C to G and vertical reference numerals 04 to 08 and asecond fingerprint acquisition region indicated by horizontal referencenumerals D to F and vertical reference numerals 00 to 03, which areshown by shadow, are selected as the preset fingerprint acquisitionregion.

As mentioned above, the source and specific forms of the fingerprintacquisition triggering instruction in the embodiment of the disclosuremay be different according to different application scenes. Preferably,the fingerprint acquisition triggering instruction includes, but is notlimited to, a first display screen wake-up instruction, a second displayscreen wake-up instruction, a display screen wake-up and authenticationinstruction, and an authentication instruction.

1) The first display screen wake-up instruction is generated when it isdetected that a power key or a start key of the electronic device ispressed by a user in a black screen state.

The method for controlling fingerprint acquisition according to theembodiment of the disclosure may be applied to a scene of unlocking thedisplay screen. Accordingly, for an electronic device in which a displayscreen needs to be waken up via a power key or a start key (i.e., theHome key), when the user performs a touch operation such as pressing onthe power key or the start key of the electronic device, the electronicdevice generates a first display screen wake-up instruction according tothe touch operation. After the display screen is waken up, a nextoperation of the user is very likely to unlock the display screen.Therefore, in the embodiment of the disclosure, the first display screenwake-up instruction above-described is used as a fingerprint acquisitiontriggering instruction in order to make preparation for unlocking thedisplay screen.

In the embodiment of the disclosure, the electronic device is furtherprovided with a touch sensing apparatus for detecting a user's touchoperation on the display screen, and the touch sensing apparatus remainsin an operating state in a case that the display screen is in a blackscreen state, so that the user can wake up the display screen of theelectronic device by clicking on any region of the display screen.

2) The second display screen wake-up instruction is generated when thetouch sensing apparatus detects that a first touch operation isperformed by the user in the black screen state.

The first touch operation includes any one of performing a single clickon the display screen, performing a continuous click on the displayscreen and touching the display screen for a long time. That is, basedon the electronic device provided with a touch sensor, when the methodfor controlling fingerprint acquisition according to the embodiment ofthe disclosure is applied to a scene of unlocking a display screen, thetouch sensing apparatus of the electronic device may be used to detectwhether the user performs a first touch operation in a black screenstate, and the second display screen wake-up instruction may begenerated when it is detected that the user performs the first touchoperation. After the display screen is waken up, a next operation of theuser is very likely to unlock the display screen. Therefore, in theembodiment of the disclosure, the first display screen wake-upinstruction above-described is used as a fingerprint acquisitiontriggering instruction in order to make preparation for unlocking thedisplay screen.

3) The display screen wake-up and authentication instruction isgenerated when the touch sensing apparatus detects that a second touchoperation is performed by the user in the black screen state.

The second touch operation includes any one of performing a single clickon the preset fingerprint acquisition region of the display screen,performing a continuous click on the preset fingerprint acquisitionregion of the display screen and touching the preset fingerprintacquisition region for a long time. A touch region corresponding to thefirst touch operation may be any region of the display screen, but atouch region corresponding to the second touch operation includes onlythe preset fingerprint acquisition region on the display screen.

4) The authentication instruction is generated by an application in theelectronic device.

In the process of interaction between an application in the electronicdevice and the user, in order to ensure the security of userinformation, when the application asks the user to log into an accountor pay online, the identity of the user needs to be authenticated. Thus,in the embodiment of the disclosure, an authentication instructiongenerated by the application is used as the fingerprint acquisitiontriggering instruction to use an acquired fingerprint image forauthentication.

Based on different types of fingerprint acquisition triggeringinstructions described above (namely, the first display screen wake-upinstruction, the second display screen wake-up instruction, the displayscreen wake-up and authentication instruction and the authenticationinstruction), a method for controlling fingerprint acquisition based ona display screen is provided according to another embodiment of thedisclosure, of which a flowchart is shown in FIG. 5. In the embodiment,since different types of fingerprint acquisition triggering instructionscorrespond to different application scenes, the subsequent steps forcontrolling fingerprint acquisition are different. Referring to FIG. 5,the method for controlling fingerprint acquisition includes thefollowing steps.

In step S1, a fingerprint acquisition triggering instruction from a useror an application is detected, and the following step S21 or S221 areselected to be performed according to the type of the fingerprintacquisition triggering instruction.

In step S21, the preset fingerprint acquisition region is controlled toemit strong light to illuminate a finger surface, when the fingerprintacquisition triggering instruction detected is the display screenwake-up and authentication instruction or the authenticationinstruction, and step S3 is performed.

An application scene corresponding to the display screen wake-up andauthentication instruction is that the user performs a continuous clickoperation, a long-time touch operation and the like on the presetfingerprint acquisition region of the display screen in a black screenstate. It indicates that the user knows the exact position of the presetfingerprint acquisition region on the display screen at this time, andthe actual need of the user is to unlock the display screen. In thiscase, the preset fingerprint acquisition region is directly controlledto emit strong light to illuminate the user's finger surface, and then afingerprint image of the user's finger is generated according to thelight reflected through the finger by triggering the fingerprint sensorin the following step S23.

For the above-mentioned authentication instruction generated by theapplication, the corresponding application scene is to log into anaccount, pay online, or the like in the process of interaction betweenthe application and the user, and its direct purpose is to acquire afingerprint image of the user for authentication. Therefore, in thiscase, the preset fingerprint acquisition region is directly controlledto emit strong light, and a fingerprint image of the user's finger isacquired quickly in the following step S3.

In step S221, the fingerprint acquisition region is controlled todisplay a preset prompt icon to prompt the user to touch the region witha finger and inform the user of a position to be touched by the finger,when the fingerprint acquisition triggering instruction detected is thefirst display screen wake-up instruction or the second display screenwake-up instruction.

In step S222, it is determined whether the user touches the presetfingerprint acquisition region with a finger by using the touch sensingapparatus.

In step S223, the preset fingerprint acquisition region is controlled toemit strong light to illuminate a finger surface, when it is determinedthat the user touches the preset fingerprint acquisition region with thefinger.

An application scene corresponding to the first display screen wake-upinstruction is that the user presses a power key or a start key in ablack screen state, and an application scene corresponding to the seconddisplay screen wake-up instruction is that the user performs a singleclick operation, a continuous click operation, a long-time touchoperation or the like on any region of the display screen in a blackscreen state. In the two application scenes, the user's direct purposemay only be to wake up the display screen to view time or to viewwhether there is a new notification message, and it cannot be determinedwhether the user needs to unlock the display screen. Therefore, in thiscase, the preset prompt icon is displayed in the preset fingerprintacquisition region in the step S221 to prompt the user that the fingercan touch a position for displaying the preset prompt icon, and then itis detected whether the user is touching the region with the finger instep S222. If the user is touching the region with the finger, whichindicates that the user has a need of unlocking the display screenthrough fingerprint identification, step S223 and the subsequent step S3can be performed. If it is not detected that the user is touching theregion with the finger in step S222, which indicates that the user hasno need of unlocking the display screen, it is not necessary to performthe subsequent steps.

In step S3, the fingerprint sensor is triggered to acquire a fingerprintimage.

From the above steps in the method, in this embodiment, the user canwake up the display screen by performing a single click operation, acontinuous click operation, a long-time touch operation or the like onany region of the display screen, or by pressing the power key/startkey, in a black screen state, so that the display screen displays apreset prompt icon to indicate a position to be touched by the finger.This facilitates the further unlocking of the display screen by theuser, and may start the fingerprint acquisition process and makepreparation for unlocking the display screen. Additionally, in thisembodiment, the user may directly start a fingerprint acquisitionfunction (including controlling the preset fingerprint acquisitionregion to emit strong light and triggering the fingerprint sensor toacquire a fingerprint image) to complete the fingerprint acquisitionquickly by performing a continuous click operation, a long-time touchoperation, or the like on the preset fingerprint acquisition region ofthe display screen in the black screen state, on the premise of knowingthe exact position of the preset fingerprint acquisition region on thedisplay screen. Alternatively, the user may directly start thefingerprint acquisition function to complete the fingerprint acquisitionquickly, ensuring that the authentication process based on thefingerprint image is completed successfully and quickly, when anauthentication instruction is generated by the application.

As can be seen, in the embodiment of the disclosure, different controlmethods are used for the fingerprint acquisition in differentapplication scenes, according to different types of fingerprintacquisition triggering instructions. When it cannot be determinedwhether the user has a need of unlocking the display screen with afingerprint, firstly the preset fingerprint acquisition region iscontrolled to display the preset prompt icon. Compared with lightrequired in the fingerprint acquisition, less power is consumed fordisplaying the preset prompt icon and light for displaying the presetprompt icon is not dazzling, thus the display screen informs the user ofa position to be touched by the finger on the premise that less power ofthe electronic device is consumed. In a scene that the fingerprintacquisition function needs to be directly started, the steps ofdisplaying the preset prompt icon, detecting whether the user istouching the region with a finger, and the like are omitted. Also, thepreset fingerprint acquisition region is directly controlled to emitlight and the fingerprint sensor is triggered. In the method forcontrolling fingerprint acquisition according to the embodiment of thedisclosure, the actual demands in the specific application scenes arefully taken into account. The fingerprint acquisition function isstarted at the right time without affecting functions of the displayscreen and other related components of the electronic device, to ensurethat a fingerprint image is obtained quickly. In this way, it ispossible that a hardware structure in which the ultra-thin fingerprintsensor is integrated under the display screen operates normally. Also,the cost of hardware integration may be reduced, the appearance of theelectronic device may be simplified and the user experience may beimproved.

In a feasible embodiment of the disclosure, the above step S221 ofcontrolling the preset fingerprint acquisition region to display apreset prompt icon specifically may include: controlling the presetfingerprint acquisition region to statically display the preset prompticon.

In another feasible embodiment of the disclosure, the above step S221 ofcontrolling the preset fingerprint acquisition region to display apreset prompt icon specifically may include: controlling the presetfingerprint acquisition region to dynamically display the preset prompticon.

The dynamically displaying the preset prompt icon may be to control thepreset fingerprint acquisition region to display multiple differenttypes of preset prompt icons in sequence. As shown in FIG. 6, the presetprompt icon may include multiple types of icons, such as a preset figureshown in an interface 601, a preset image shown in an interface 602, anda preset text shown in an interface 603. Accordingly, the type of iconmay be controlled to be changed one time every 0.5 seconds (or otherpreset interval) in the preset fingerprint acquisition region. Ofcourse, an order of displaying different types of preset prompt iconsmay be a default preset display order, or may be defined by the user.

Additionally, the dynamically displaying the preset prompt icon may alsobe to dynamically adjust the brightness of the preset prompt icon, oradjust the brightness of each preset prompt icon in displaying the eachpresent prompt icon, while different types of preset prompt icons aredisplayed in sequence.

In the embodiment, the dynamically displaying the preset prompt icon inthe preset fingerprint acquisition region is easy to attract user'sattention, convenient for the user to quickly find the position to betouched by a finger.

Referring to FIG. 7, in a method for controlling fingerprint acquisitionbased on a display screen according to another embodiment of thedisclosure, after the fingerprint sensor is triggered to acquire afingerprint image, the method may further include the steps S4 and S5.

In step S4, it is determined whether the fingerprint image acquired bythe fingerprint sensor satisfies a preset quality standard.

The preset quality standard indicates that at least one of an area,brightness and contrast of the fingerprint image satisfies a presetrange.

In step S5, when the fingerprint image does not satisfy the presetquality standard, a preset adjustment operation is performed, and themethod is returned to the step S3, that is, the fingerprint sensor isre-triggered to acquire a new fingerprint image.

Specifically, the performing a preset adjustment operation includes atleast one of: adjusting screen brightness of the preset fingerprintacquisition region, adjusting exposure time of the fingerprint sensor,and adjusting a gain coefficient of the fingerprint sensor. The longerthe exposure time is, the more the amount of light entered into thefingerprint sensor is, and thus the greater the brightness of thefingerprint image obtained is. Conversely, the shorter the exposure timeis, the less the brightness of the fingerprint image obtained is. Thegreater the gain coefficient is, the stronger the intensity of an analogsignal obtained by converting an optical signal in the fingerprintsensor is, and thus the greater the brightness of the fingerprint imageobtained is. Conversely, the smaller the gain coefficient is, the lessthe brightness of the fingerprint image obtained is.

In actual application, when the user touches the display screen, thequality of the fingerprint image acquired by the fingerprint sensor maybe affected by factors such as dryness/wetness of the finger surface.For example, the fingerprint image acquired may be too dark or toobright, and fingerprint ridges are not clear and difficult to bedistinguished. The quality of the fingerprint image directly affects theauthentication based on the fingerprint image. If the quality of thefingerprint image is too poor, it is difficult to determine whether theuser is an authorized user based on the fingerprint image. Therefore, inthe embodiment of the disclosure, after the fingerprint sensor istriggered to acquire a fingerprint image in step S3, it is detectedwhether the fingerprint image acquired satisfies a preset qualitystandard in step S4, which includes detecting whether an area of thefingerprint image is within a preset area range, detecting whetherbrightness of the fingerprint image is within a preset brightness range,detecting whether contrast of the fingerprint image is within a presetcontrast range, and the like. According to different accuracyrequirements, the specific determination method includes, but is notlimited to, (1) determining that the fingerprint image does not satisfythe preset quality standard, when all the area, brightness and contrastof the fingerprint image are not within the corresponding preset ranges;(2) determining that the fingerprint image does not satisfy the presetquality standard, when at least one of the area, brightness and contrastof the fingerprint image is not within the corresponding preset range.

When it is determined that the fingerprint image does not satisfy thepreset quality standard, the fingerprint sensor is triggered tore-acquire a new fingerprint image in step S5, until a fingerprint imagesatisfying the preset quality standard is obtained.

As can be seen, in the embodiment of the disclosure, by adding theabove-described steps S4 and S5, a fingerprint image is automaticallyre-acquired until the fingerprint image satisfies the preset qualitystandard, when the quality of the fingerprint image acquired is too poor(not satisfying the preset quality standard) due to interference factorssuch as dryness/wetness of the finger surface. Therefore, the definitionof the fingerprint image acquired can be ensured in the embodiment ofthe disclosure, that is, it is ensured that the quality of thefingerprint image is high, and thus it is ensured that theauthentication result is more accurate.

Referring to FIG. 8, in a method for controlling fingerprint acquisitionbased on a display screen according to another embodiment of thedisclosure, after the fingerprint sensor is triggered to acquire afingerprint image, the method may further include the following steps S6to S8.

In step S6, it is determined whether a preset template matching thefingerprint image exists. Step S7 is performed, if the preset templatematching the fingerprint image exists; otherwise, step S8 is performed.

In step S7, the electronic device is triggered to perform acorresponding preset operation, when the preset template matching thefingerprint image exists.

In step S6 of the embodiment, the fingerprint image acquired is comparedwith the preset template. If a preset template matching the fingerprintimage exists, which indicates that the user is an authorized user, thatis, the user is authenticated, then the electronic device can betriggered to perform a preset operation, such as unlocking the displayscreen, logging into an account, and completing online payment.

In step S8, it is determined whether the number of matching failures isless than a preset number, when the preset template matching thefingerprint image does not exist. The method is returned to step S3,that is, the fingerprint sensor is re-triggered to acquire a newfingerprint image, when the number of matching failures is less than thepreset number.

If it is determined that the preset template matching the fingerprintimage does not exist in step S6, it may be because the user is not anauthorized user, or may also be because the quality of the fingerprintimage is too poor. In order to avoid that the authorized user cannot beauthenticated due to the poor quality of the fingerprint image (forexample, a fingerprint image of high quality cannot be generated, sincethe user uses a wrong finger, or a finger is too dry/wet), it is allowedto re-acquire a fingerprint image within a preset number by step S8, inthe embodiment of the disclosure. Therefore, it can be avoided that anunauthorized user indefinitely attempts to perform authentication, andit can be ensured that the authorized user is identified by re-acquiringa fingerprint image and performing re-matching, after the first matchingfails. Then the preset operation in step S7 can be performed.

As can be seen, in the embodiment of the disclosure, the fingerprintimage acquired is matched with the preset template to verify whether theuser is an authorized user. If the matching fails, the fingerprint imageof the user is re-acquired and is matched with the preset templateagain. Meanwhile, the number of matching failures is defined. Therefore,it can be avoided that an unauthorized user indefinitely attempts toperform authentication, and it can be ensured that each authorized useris accurately identified by performing re-matching and eliminatinginterference factors, after the matching fails.

In correspondence to the above-described method embodiments, a computerstorage medium is further provided according to an embodiment of thedisclosure. For example, the computer storage medium may be a read-onlymemory (ROM), a random-access memory (RAM), a magnetic tape, a floppydisk, an optical data storage device, and the like. A program is storedin the computer storage medium. When the program in the storage mediumis executed by a processor of an electronic device (which includes adisplay screen, a touch sensing apparatus, and a fingerprint sensorinstalled under the display screen corresponding to a preset fingerprintacquisition region of the display screen), the electronic device iscaused to perform a part or all of steps of the method for controllingfingerprint acquisition based on a display screen according to theabove-described method embodiments.

Additionally, an apparatus for controlling fingerprint acquisition basedon a display screen is further provided according to an embodiment ofthe disclosure, which is applied to an electronic device. The electronicdevice includes at least a display screen, a touch sensing apparatus anda fingerprint sensor installed under the display screen corresponding toa preset fingerprint acquisition region of the display screen. Theapparatus includes: a processor, and a memory configured for storinginstructions being executable by the processor, where the processor isconfigured for: performing a part or all of steps of the method forcontrolling fingerprint acquisition based on a display screen accordingto the above-described method embodiments, when executable instructionsstored in the memory are called.

FIG. 9 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anembodiment of the disclosure. The apparatus is applied to an electronicdevice, and the electronic device includes at least a display screen anda fingerprint sensor installed under the display screen corresponding toa preset fingerprint acquisition region of the display screen. Referringto FIG. 9, the apparatus includes: a triggering instruction detectingunit 100, an acquisition region control unit 200, and a fingerprintacquisition triggering unit 300.

The triggering instruction detecting unit 100 is configured fordetecting a fingerprint acquisition triggering instruction from a useror an application.

The acquisition region control unit 200 is configured for controllingthe preset fingerprint acquisition region to emit light to illuminate afinger surface, according to the fingerprint acquisition triggeringinstruction detected.

The fingerprint acquisition triggering unit 300 is configured fortriggering the fingerprint sensor to acquire a fingerprint image, afterthe preset fingerprint acquisition region is controlled by theacquisition region control unit to emit light.

As can be seen from the above-described technical solutions, in theapparatus for controlling fingerprint acquisition based on a displayscreen according to the embodiment of the disclosure, a fingerprintacquisition triggering instruction is detected in real time by thetriggering instruction detecting unit. If and only if the fingerprintacquisition triggering instruction is detected, that is, there is a needto perform a fingerprint acquisition operation, the preset fingerprintacquisition region of the display screen is controlled to emit light anda fingerprint sensor is triggered to be in a normal operating state.Accordingly, in a case that there is no fingerprint acquisitiontriggering instruction, the preset fingerprint acquisition region can bein a black screen state or display the current program interface, whichis the same as other regions of the display screen, and the fingerprintsensor can be in a non-operating state in order to reduce the power ofthe electronic device consumed for the fingerprint acquisition functionas far as possible. Meanwhile, in the embodiment of the disclosure, onlythe preset fingerprint acquisition region on the display screen is usedin the fingerprint acquisition, and other regions on the display screenother than the preset fingerprint acquisition region are not affected inthe fingerprint acquisition, and still used for displaying according tothe display needs of the current scene or keep the black screen state.That is, in acquiring fingerprint based on the display screen, theoriginal display or the black screen state of the display screen is notaffected, and it is ensured that the user can accurately touch thescreen with a finger. As a result, the accurate man-machine interactionis ensured in acquiring fingerprint based on the display screen and afingerprint image is acquired accurately and quickly. Therefore, it ispossible that a hardware structure in which the ultra-thin fingerprintsensor is integrated under the display screen operates normally. Also,the cost of hardware integration may be reduced, the appearance of theelectronic device may be simplified and the user experience may beimproved.

Preferably, in an embodiment of the disclosure, the preset fingerprintacquisition region controlled by the acquisition region control unit maybe any one of regions shown in the above FIG. 4A, FIG. 4B, FIG. 4C andFIG. 4D, convenient for the user to touch the regions with a finger.

Preferably, in an embodiment of the disclosure, based on the touchsensing apparatus of the electronic device, the fingerprint acquisitiontriggering instruction detected by the triggering instruction detectingunit includes at least one of a display screen wake-up andauthentication instruction, an authentication instruction, a firstdisplay screen wake-up instruction, and a second display screen wake-upinstruction.

For the relevant content of the four instructions, reference may be madeto the description of the above method embodiments, which is notrepeated herein.

FIG. 10 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anembodiment of the disclosure. The apparatus is also applied to anelectronic device, and the electronic device includes a display screen,a touch sensing apparatus and a fingerprint sensor installed under thedisplay screen corresponding to a preset fingerprint acquisition regionof the display screen. The apparatus includes: a triggering instructiondetecting unit 100, an acquisition region control unit 200, and afingerprint acquisition triggering unit 300.

The triggering instruction detecting unit 100 is configured fordetecting a fingerprint acquisition triggering instruction from a useror an application.

The acquisition region control unit 200 is configured for controllingthe preset fingerprint acquisition region to emit light to illuminate afinger surface, according to the fingerprint acquisition triggeringinstruction detected.

The fingerprint acquisition triggering unit 300 is configured fortriggering the fingerprint sensor to acquire a fingerprint image, afterthe preset fingerprint acquisition region is controlled by theacquisition region control unit to emit light.

The fingerprint acquisition triggering instruction detected by thetriggering instruction detecting unit 100 includes at least one of adisplay screen wake-up and authentication instruction, an authenticationinstruction, a first display screen wake-up instruction, and a seconddisplay screen wake-up instruction. The acquisition region control unit200 will employ different control ways for different fingerprintacquisition triggering instructions detected.

In view of this, for the above-mentioned “display screen wake-up andauthentication instruction” and “authentication instruction”, theacquisition region control unit 200 may include:

a first light emitting control unit 210, configured for controlling thepreset fingerprint acquisition region to emit strong light to illuminatea finger surface, when the fingerprint acquisition triggeringinstruction detected is the display screen wake-up and authenticationinstruction or the authentication instruction.

For the above-mentioned “first display screen wake-up instruction” and“second display screen wake-up instruction”, the acquisition regioncontrol unit 200 may include:

a prompt icon control unit 221, configured for controlling the presetfingerprint acquisition region to display a preset prompt icon to promptthe user to touch the region with a finger and inform the user of aposition to be touched by the finger, when the fingerprint acquisitiontriggering instruction detected is the first display screen wake-upinstruction or the second display screen wake-up instruction;

a touch operation detecting unit 222, configured for determining whetherthe user touches the preset fingerprint acquisition region with a fingerby using the touch sensing apparatus, after the preset prompt icon isdisplayed; and

a second light emitting control unit 223, configured for controlling thepreset fingerprint acquisition region to emit strong light to illuminatea finger surface, when it is determined that the user touches the presetfingerprint acquisition region with a finger.

As can be seen, in the embodiment of the disclosure, different controlmethods are used for the fingerprint acquisition in differentapplication scenes, according to different types of fingerprintacquisition triggering instructions. When it cannot be determinedwhether the user has a need of unlocking the display screen with afingerprint, firstly the preset fingerprint acquisition region iscontrolled to display the preset prompt icon. Compared with lightrequired in the fingerprint acquisition, less power is consumed fordisplaying the preset prompt icon and light for displaying the presetprompt icon is not dazzling, thus the display screen informs the user ofa position to be touched by the finger on the premise that less power ofthe electronic device is consumed. In a scene that the fingerprintacquisition function needs to be directly started, the steps ofdisplaying the preset prompt icon, detecting whether the user istouching the region with a finger, and the like are omitted. Also, thepreset fingerprint acquisition region is directly controlled to emitlight and the fingerprint sensor is triggered. In the method forcontrolling fingerprint acquisition according to the embodiment of thedisclosure, the actual demands in the specific application scenes arefully taken into account. The fingerprint acquisition function isstarted at the right time without affecting functions of the displayscreen and other related components of the electronic device, to ensurethat a fingerprint image is obtained quickly. In this way, it ispossible that a hardware structure in which the ultra-thin fingerprintsensor is integrated under the display screen operates normally. Also,the cost of hardware integration may be reduced, the appearance of theelectronic device may be simplified and the user experience may beimproved.

In a feasible embodiment of the disclosure, the prompt icon control unit221 may include at least one of a prompt icon static control unit and aprompt icon dynamic control unit.

The prompt icon static control unit is configured for controlling thepreset fingerprint acquisition region to statically display the presetprompt icon, when the fingerprint acquisition triggering instructiondetected is the first display screen wake-up instruction or the seconddisplay screen wake-up instruction.

The prompt icon dynamic control unit is configured for when thefingerprint acquisition triggering instruction detected is the firstdisplay screen wake-up instruction or the second display screen wake-upinstruction, controlling the preset fingerprint acquisition region todynamically display the preset prompt icon in any one of the followingways: dynamically adjusting the brightness of the preset prompt icon,and controlling the preset fingerprint acquisition region to displaymultiple different types of preset prompt icons in sequence.

In the above embodiment, the two control ways, i.e. the static controlway and the dynamic control way, each has advantages. The static controlway based on the prompt icon static control unit is simple and easy tobe achieved, while the dynamic control way based on the prompt icondynamic control unit is easy to attract user's attention, convenient forthe user to quickly find the position to be touched by a finger.

FIG. 11 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anembodiment of the disclosure. The apparatus is applied to an electronicdevice, and the electronic device includes at least a display screen anda fingerprint sensor installed under the display screen corresponding toa preset fingerprint acquisition region of the display screen. Referringto FIG. 11, the apparatus includes: a triggering instruction detectingunit 100, an acquisition region control unit 200, a fingerprintacquisition triggering unit 300, an image quality detecting unit 400 anda control parameter adjusting unit 500.

The triggering instruction detecting unit 100 is configured fordetecting a fingerprint acquisition triggering instruction from a useror an application.

The acquisition region control unit 200 is configured for controllingthe preset fingerprint acquisition region to emit light to illuminate afinger surface, according to the fingerprint acquisition triggeringinstruction detected.

The fingerprint acquisition triggering unit 300 is configured fortriggering the fingerprint sensor to acquire a fingerprint image, afterthe preset fingerprint acquisition region is controlled by theacquisition region control unit to emit light.

The image quality detecting unit 400 is configured for determiningwhether the fingerprint image satisfies a preset quality standard,wherein the preset quality standard includes: at least one of an area,brightness and contrast of the fingerprint image satisfying a presetrange.

The control parameter adjusting unit 500 is configured for performing apreset adjustment operation and re-triggering the fingerprint sensor toacquire a fingerprint image, when the fingerprint image does not satisfythe preset quality standard. The performing a preset adjustmentoperation includes at least one of: adjusting screen brightness of thepreset fingerprint acquisition region, adjusting exposure time of thefingerprint sensor, and adjusting gain coefficient of the fingerprintsensor.

As can be seen, compared with the above embodiments as shown in FIG. 9or FIG. 10, the image quality detecting unit and the control parameteradjusting unit are added in the embodiment shown in FIG. 11 in thedisclosure, thereby ensuring that the fingerprint image acquired has ahigh quality, and thus ensuring that the result of authentication ismore accurate.

FIG. 12 is a structural block diagram of an apparatus for controllingfingerprint acquisition based on a display screen according to anembodiment of the disclosure. The apparatus is applied to an electronicdevice, and the electronic device includes at least a display screen anda fingerprint sensor installed under the display screen corresponding toa preset fingerprint acquisition region of the display screen. Referringto FIG. 12, the apparatus includes: a triggering instruction detectingunit 100, an acquisition region control unit 200, and a fingerprintacquisition triggering unit 300, a fingerprint image matching unit 600,and a matching failure processing unit 700.

The triggering instruction detecting unit 100 is configured fordetecting a fingerprint acquisition triggering instruction from a useror an application.

The acquisition region control unit 200 is configured for controllingthe preset fingerprint acquisition region to emit light to illuminate afinger surface, according to the fingerprint acquisition triggeringinstruction detected.

The fingerprint acquisition triggering unit 300 is configured fortriggering the fingerprint sensor to acquire a fingerprint image, afterthe preset fingerprint acquisition region is controlled by theacquisition region control unit to emit light.

The fingerprint image matching unit 600 is configured for determiningwhether a preset template matching the fingerprint image exists, andtriggering the electronic device to perform a corresponding presetoperation, when a preset template matching the fingerprint image exists.

The matching failure processing unit 700 is configured for determiningwhether the number of matching failures is less than a preset number,when the preset template matching the fingerprint image does not exist,and re-triggering the fingerprint sensor to acquire a new fingerprintimage, when the number of matching failures is less than the presetnumber.

As can be seen, in the embodiment of the disclosure, when thefingerprint image acquired is matched with the preset template to verifywhether the user is an authorized user, the fingerprint image of theuser is re-acquired and is matched with the preset template again by thematching failure processing unit, if the matching fails. Meanwhile, thenumber of matching failures is defined. Therefore, it can be avoidedthat an unauthorized user indefinitely attempts to performauthentication, and it can be ensured that each authorized user isaccurately identified by performing re-matching and eliminatinginterference factors, after the matching fails.

For the apparatus according to the above-described embodiments, thespecific ways of various modules performing operations have beendescribed in detail in the relevant method embodiments, which are notset forth in detail herein.

In addition, an electronic device is further provided according to anembodiment of the present disclosure, which includes: a display screen,a touch sensing apparatus, a fingerprint sensor installed under thedisplay screen corresponding to a preset fingerprint acquisition regionof the display screen, and the apparatus for controlling fingerprintacquisition based on a display screen according to any one of theabove-described embodiments. For example, the electronic device may be amobile phone, a tablet computer and the like.

After considering the specification and practice of the presentdisclosure, those skilled in the art readily obtain other embodiments ofthe disclosure. This application is intended to cover any variations,uses, or adaptations of the disclosure. These variations, uses, oradaptations comply with general principles of the application andinclude common knowledge or customary technical means in the art whichare not disclosed in the disclosure. The specification and embodimentsare just taken to be exemplary, and the true scope and spirit of thedisclosure is defined by the following claims.

It is to be understood that the disclosure is not limited to the precisestructures described above and shown in drawings, and various changesand modifications may be made without departing from the scope of thedisclosure. The scope of the present disclosure is defined by only theappended claims.

What is claimed is:
 1. A method for controlling fingerprint acquisitionbased on a display screen, which is applied to an electronic device,wherein the electronic device comprises at least a display screen, and afingerprint sensor installed under the display screen corresponding to apreset fingerprint acquisition region of the display screen, the methodcomprises: detecting a fingerprint acquisition triggering instructionfrom a user or an application; controlling the preset fingerprintacquisition region to emit light to illuminate a finger surface,according to the fingerprint acquisition triggering instructiondetected; and triggering the fingerprint sensor to acquire a fingerprintimage, wherein the fingerprint acquisition triggering instructionincludes an authentication instruction generated by the application inthe electronic device.
 2. The method according to claim 1, wherein thecontrolling the preset fingerprint acquisition region to emit lightaccording to the fingerprint acquisition triggering instruction detectedcomprises: controlling the preset fingerprint acquisition region to emitlight to illuminate a finger surface, when the fingerprint acquisitiontriggering instruction detected is a display screen wake-up andauthentication instruction or the authentication instruction.
 3. Themethod according to claim 1, wherein the controlling the presetfingerprint acquisition region to emit light according to thefingerprint acquisition triggering instruction detected comprises:controlling the preset fingerprint acquisition region to display apreset prompt icon to prompt the user to touch the preset fingerprintacquisition region with a finger and inform the user of a position to betouched by the finger, according to the fingerprint acquisitiontriggering instruction; determining whether the user touches the presetfingerprint acquisition region with the finger by using a touch sensingapparatus; and controlling the preset fingerprint acquisition region toemit light to illuminate a finger surface, when it is determined thatthe user touches the preset fingerprint acquisition region with thefinger.
 4. A method for controlling fingerprint acquisition based on adisplay screen, which is applied to an electronic device, wherein theelectronic device comprises at least a display screen, and a fingerprintsensor installed under the display screen corresponding to a presetfingerprint acquisition region of the display screen, the methodcomprises: detecting a fingerprint acquisition triggering instructionfrom a user or an application; controlling the preset fingerprintacquisition region to emit light to illuminate a finger surface,according to the fingerprint acquisition triggering instructiondetected; and triggering the fingerprint sensor to acquire a fingerprintimage, wherein the controlling the preset fingerprint acquisition regionto emit light according to the fingerprint acquisition triggeringinstruction detected comprises: controlling the preset fingerprintacquisition region to display a preset prompt icon to prompt the user totouch the preset fingerprint acquisition region with a finger and informthe user of a position to be touched by the finger, according to thefingerprint acquisition triggering instruction; determining whether theuser touches the preset fingerprint acquisition region with the fingerby using a touch sensing apparatus; and controlling the presetfingerprint acquisition region to emit light to illuminate a fingersurface, when it is determined that the user touches the presetfingerprint acquisition region with the finger.
 5. The method accordingto claim 4, wherein the controlling the preset fingerprint acquisitionregion to display a preset prompt icon comprises: controlling the presetfingerprint acquisition region to statically display the preset prompticon, or controlling the preset fingerprint acquisition region todynamically display the preset prompt icon, wherein the controlling thepreset fingerprint acquisition region to dynamically display the presetprompt icon comprises at least one of: dynamically adjusting brightnessof the preset prompt icon; and controlling the preset fingerprintacquisition region to display multiple different types of preset prompticons in sequence.
 6. The method according to claim 5, wherein a type ofthe preset prompt icon comprises at least one of a preset figure, apreset image, and a preset text.
 7. A method for controlling fingerprintacquisition based on a display screen, which is applied to an electronicdevice, wherein the electronic device comprises at least a displayscreen, and a fingerprint sensor installed under the display screencorresponding to a preset fingerprint acquisition region of the displayscreen, the method comprises: detecting a fingerprint acquisitiontriggering instruction from a user or an application; controlling thepreset fingerprint acquisition region to emit light to illuminate afinger surface, according to the fingerprint acquisition triggeringinstruction detected; and triggering the fingerprint sensor to acquire afingerprint image, wherein the fingerprint acquisition triggeringinstruction comprises at least one of: a first display screen wake-upinstruction generated when it is detected that a power key or a startkey of the electronic device is pressed by a user in a black screenstate; a second display screen wake-up instruction generated when atouch sensing apparatus detects that a first touch operation isperformed by the user in a black screen state, wherein the first touchoperation comprises any one of performing a single click on the displayscreen, performing a continuous click on the display screen and touchingthe display screen for a long time, and the touch sensing apparatus isdisposed in the electronic device to detect a touch operation of theuser on the display screen; and a display screen wake-up andauthentication instruction generated when the touch sensing apparatusdetects that a second touch operation is performed by the user in ablack screen state, wherein the second touch operation comprises any oneof performing a single click or continuous click on the presetfingerprint acquisition region and touching the preset fingerprintacquisition region for a long time.
 8. A method for controllingfingerprint acquisition based on a display screen, which is applied toan electronic device, wherein the electronic device comprises at least adisplay screen, and a fingerprint sensor installed under the displayscreen corresponding to a preset fingerprint acquisition region of thedisplay screen, the method comprises: detecting a fingerprintacquisition triggering instruction from a user or an application;controlling the preset fingerprint acquisition region to emit light toilluminate a finger surface, according to the fingerprint acquisitiontriggering instruction detected; and triggering the fingerprint sensorto acquire a fingerprint image, wherein the controlling the presetfingerprint acquisition region to emit light to illuminate a fingersurface comprises: adjusting screen brightness of the preset fingerprintacquisition region.
 9. The method according to claim 8, the adjusting ofscreen brightness of the preset fingerprint acquisition regioncomprises: determining whether a preset template matching thefingerprint image exists; triggering the electronic device to perform acorresponding preset operation, when the preset template matching thefingerprint image exists; and adjusting the screen brightness of thepreset fingerprint acquisition region, when the preset template matchingthe fingerprint image does not exist.